Low tunnels are essential small greenhouses, built over crops for protection. They are sometimes used for protection from rain during the growing season, but they can also be used for overwintering crops, e.g., to protect crops from winter cold temperatures.

Over a period of four years (2009-2013), we established low tunnels at University of New Hampshire and University of Massachusetts research farms. Both sites are zone 5B. These low tunnels were used for a variety of experiments. This report contains general observations and lessons learned from our work using low tunnels to overwinter crops.Access the full report for more details.